Even though its title is misleading ("Troubleshoot Problems Opening the Start Menu or Cortana") the third item in the list of things to try includes a start menu troubleshooter. Follow the prompts and this should refresh/repair the start menu. You could also try running a System File Checker scan from an elevated command prompt. This scan will check for any other damaged or corrupt system files.

Right-click the Start button and then click on Command Prompt (Admin). A new screen will open with a black background and white letters. At the flashing cursor type in sfc /scannow and click Enter. (Note the space between sfc and /scannow.) On my machine the scan takes about 20 minutes so be patient. Please post back the results of the start menu troubleshooter and/or the system file checker scan

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Even though its title is misleading ("Troubleshoot Problems Opening the Start Menu or Cortana") the third item in the list of things to try includes a start menu troubleshooter. Follow the prompts and this should refresh/repair the start menu. You could also try running a System File Checker scan from an elevated command prompt. This scan will check for any other damaged or corrupt system files.

Right-click the Start button and then click on Command Prompt (Admin). A new screen will open with a black background and white letters. At the flashing cursor type in sfc /scannow and click Enter. (Note the space between sfc and /scannow.) On my machine the scan takes about 20 minutes so be patient. Please post back the results of the start menu troubleshooter and/or the system file checker scan

Windows found no integrity violations.

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Start menu, search and other apps won't start from task barHello,
I have just upgraded from Win 7 Ultimate to Win 10 build 10240
The sart menu button does not activate anything, search doesn't either, Notification bubble does not open anything either.
Safe mode produces same behaviour, I have...

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